Photosynthesis in `C_(4)` plants is relatively less limited by atmospheric `CO_(2)` levels because

Photosynthesis in `C_(4)` plants is relatively less limited by atmospheric `CO_(2)` levels because
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Photosynthesis in `C_(4)` plants is relatively less limited by atmospheric `CO_(2)` levels because A. ... 4)` plants has higher affinity for `CO_(2)`
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Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because (a) effective pumping of CO2 into bundle sheath cells (b) RuBisCO in C4 plants has higher affinity for CO2 (c) four carbon acids are the primary initial CO2 fixation products (d) the primary fixation of CO2 is mediated via PEP carboxylase. (2005) 65. In sugarcane plant

Description : Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because (a) effective pumping of CO2 into bundle sheath cells (b) RuBisCO in C4 plants has higher affinity for CO2 (c ... d) the primary fixation of CO2 is mediated via PEP carboxylase. (2005) 65. In sugarcane plant

Last Answer : (d) the primary fixation of CO2 is mediated via PEP carboxylase.

In the leaves of `C_(4)` plants, malic acid formation during `CO_(2)` fixation occurs in the cells of

Description : In the leaves of `C_(4)` plants, malic acid formation during `CO_(2)` fixation occurs in the cells of

Last Answer : In the leaves of `C_(4)` plants, malic acid formation during `CO_(2)` fixation occurs in the ... A. Epidermis B. Mesophyll C. Bundle sheath D. Phloem

The initial `CO_(2)` acceptor in `C_(4)` plants is

Description : The initial `CO_(2)` acceptor in `C_(4)` plants is

Last Answer : The initial `CO_(2)` acceptor in `C_(4)` plants is A. Phosphoglyceraldehyde B. Ribulose monophosphate C. Phosphonel pyruvate D. Ribulose diphosphate

In `C_(4)` plants , initial `CO_(2)` fixation takes place in the chloroplasts of

Description : In `C_(4)` plants , initial `CO_(2)` fixation takes place in the chloroplasts of

Last Answer : In `C_(4)` plants , initial `CO_(2)` fixation takes place in the chloroplasts of A. Gurad cells B. Mesophyll cells C. Spongy tissue D. Bundle sheath

The initial `CO_(2)` acceptor in `C_(4)` plants is

Description : The initial `CO_(2)` acceptor in `C_(4)` plants is

Last Answer : The initial `CO_(2)` acceptor in `C_(4)` plants is A. PEP B. PGA C. RuBP D. Pyruvate

Write the concentration of `CO_(2)` at which `C_(3) and C_(4)` plants shows saturation respectively.

Description : Write the concentration of `CO_(2)` at which `C_(3) and C_(4)` plants shows saturation respectively.

Last Answer : Write the concentration of `CO_(2)` at which `C_(3) and C_(4)` plants shows saturation respectively.

The `C_(4)` plants are photosynthesis more efficient then `C_(3)` plant because

Description : The `C_(4)` plants are photosynthesis more efficient then `C_(3)` plant because

Last Answer : The `C_(4)` plants are photosynthesis more efficient then `C_(3)` plant because ... photorespiration is trapped and recycled through PEP carboxylase

In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre

Description : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre

Last Answer : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)` ... 4246.5 years B. 5384 yrs C. 4628 yrs D. 2684 yrs

In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre

Description : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre

Last Answer : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. ... A. 4246 yrs B. 4624 yrs C. 4628 yrs D. 6248 yrs

In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre

Description : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre

Last Answer : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2) ... H_(2)O` and `CO_(2)` D. mechanism is not confirmed

In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre

Description : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre

Last Answer : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and ` ... nitrogen by cosmic ray neutrons D. none of the above

`C_(4)` plants are more efficient in photosynthesis than `C_(3)` plants due to

Description : `C_(4)` plants are more efficient in photosynthesis than `C_(3)` plants due to

Last Answer : `C_(4)` plants are more efficient in photosynthesis than `C_(3)` plants due to A. ... Presence of larger number of chloroplasts in the leaf cells

In `C_(3)` plants, the first stable product of photosynthesis during dark reaction is

Description : In `C_(3)` plants, the first stable product of photosynthesis during dark reaction is

Last Answer : In `C_(3)` plants, the first stable product of photosynthesis during dark reaction is A. ... acid C. Oxaloacetic acid D. 3-Phosphoglyceric acid

In `C_(3)` plants, the first stable product of photosynthesis during dark reaction is

Description : In `C_(3)` plants, the first stable product of photosynthesis during dark reaction is

Last Answer : In `C_(3)` plants, the first stable product of photosynthesis during dark reaction is A ... Phosphoglyceric acid (PGA) D. Phosphoglyceraldehyde (PGAL)

The first stable compound formed in photosynthesis of `C_(3)` plants is

Description : The first stable compound formed in photosynthesis of `C_(3)` plants is

Last Answer : The first stable compound formed in photosynthesis of `C_(3)` plants is A. Phosphoglyceric acid B. Starch C. Pyruvic acid D. Ribulose diphosphate

The first acceptor of `CO_(2)` in `C_(4)` plant is

Description : The first acceptor of `CO_(2)` in `C_(4)` plant is

Last Answer : The first acceptor of `CO_(2)` in `C_(4)` plant is A. RuBp B. PEP C. OAA D. water

To reduce `1 CO_(2)` molecules in `C_(3)` cycle , assimilatory power needed is

Description : To reduce `1 CO_(2)` molecules in `C_(3)` cycle , assimilatory power needed is

Last Answer : To reduce `1 CO_(2)` molecules in `C_(3)` cycle , assimilatory power needed is A. `3ATP, 2NPDPH_(2)` B. ... ATP, 2NADPH_(2)` D. `6.5 ATP, 2NADPH_(2)`

For the redox reation `MnO_(4)^(-)+C_(2)O_(4)^(2-)+H^(+)rarrMn^(2+)CO_(2)+H_(2)O` The correct stoichiometric coefficients of `Mno_(4)^(-),C_(2)O_(4)^(

Description : For the redox reation `MnO_(4)^(-)+C_(2)O_(4)^(2-)+H^(+)rarrMn^(2+)CO_(2)+H_(2)O` The correct stoichiometric coefficients of `Mno_(4)^(-),C_(2)O_(4)^(

Last Answer : For the redox reation `MnO_(4)^(-)+C_(2)O_(4)^(2-)+H^(+)rarrMn^(2+)CO_(2)+H_(2)O` The correct stoichiometric ... . 16, 5, 2 C. 2, 16, 5 D. 5, 2, 16

In the balanced equation `MnO_(4)^(-)+H^(+)+C_(2)O_(4)^(2-)rarr Mn^(2+)+CO_(2)+H_(2)O`, the moles of `CO_(2)` formed are :-

Description : In the balanced equation `MnO_(4)^(-)+H^(+)+C_(2)O_(4)^(2-)rarr Mn^(2+)+CO_(2)+H_(2)O`, the moles of `CO_(2)` formed are :-

Last Answer : In the balanced equation `MnO_(4)^(-)+H^(+)+C_(2)O_(4)^(2-)rarr Mn^(2+)+CO_(2)+H_(2)O`, the moles of `CO_(2)` formed are :- A. 2 B. 4 C. 5 D. 10

A 3 L gas mixture of propane `(C_(3)H_(8))` and butane `(C_(4)H_(10))` on complete combustion at 25 C produced 10 L `CO_(2.)` Assuming constant P and

Description : A 3 L gas mixture of propane `(C_(3)H_(8))` and butane `(C_(4)H_(10))` on complete combustion at 25 C produced 10 L `CO_(2.)` Assuming constant P and

Last Answer : A 3 L gas mixture of propane `(C_(3)H_(8))` and butane `(C_(4)H_(10))` on complete combustion at 25 C ... .5L` D. `C_(3)H_(8),0LandC_(4)H_(10),3L`

In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to overset(H^(o+))to` find product

Description : In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to overset(H^(o+))to` find product

Last Answer : In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to ... A. Benzoic acid B. Benzaldehyde C. Benzamide D. Benzene

In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to overset(H^(o+))to` find product

Description : In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to overset(H^(o+))to` find product

Last Answer : In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to ... A. Benzoic acid B. Benzaldehyde C. Benzamide D. Benzene

The reaction, `C_(6)H_(5)ONa +CO_(2)+H_(2)O rarr C_(6)H_(5)OH+NaHCO_(3)` suggests that `:`

Description : The reaction, `C_(6)H_(5)ONa +CO_(2)+H_(2)O rarr C_(6)H_(5)OH+NaHCO_(3)` suggests that `:`

Last Answer : The reaction, `C_(6)H_(5)ONa +CO_(2)+H_(2)O rarr C_(6)H_(5)OH+NaHCO_(3)` suggests that ... C. Water is stronger acid than phenol D. None of the above

A mixture of ether and ….. Gives temperature as low as 163 K (1) NaC1 (2) Ice (3) Solid `CO_(2)` `C_(2)H_(5)OH`

Description : A mixture of ether and ….. Gives temperature as low as 163 K (1) NaC1 (2) Ice (3) Solid `CO_(2)` `C_(2)H_(5)OH`

Last Answer : A mixture of ether and .. Gives temperature as low as 163 K (1) NaC1 (2) Ice (3) Solid `CO_(2)` ... true but R is false D. A is false but R is true

Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of C and O in `CH_(3)-O-CH_(3) is SP^(3)`

Description : Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of C and O in `CH_(3)-O-CH_(3) is SP^(3)`

Last Answer : Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of ... R is false D. A is false but R is true

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct? (a) Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate.(b) C3 plants respond to higher temperature with enhanced photosynthesis while C4 plants have much lower temperature optimum. (c) Tomato is a greenhouse crop which can be grown in CO2-enriched atmosphere for higher yield. (d) Light saturation for CO2 fixation occurs at 10% of full sunlight.

Description : With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct? (a) Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate. ( ... for higher yield. (d) Light saturation for CO2 fixation occurs at 10% of full sunlight.

Last Answer : (b) C3 plants respond to higher temperature with enhanced photosynthesis while C4 plants have much lower temperature optimum

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ? (1) Increasing atmospheric CO 2 concentration up to 0.05% can enhance CO 2 fixation rate (2) C 3 plants respond to higher temperatures with enhanced photosynthesis while C 4 plants have much lower temperature optimum (3) Tomato is a greenhouse crop which can be grown in CO 2 - enriched atmosphere for higher yield (4) Light saturation for CO 2 fixation occurs at 10% of full sunlight

Description : With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ? (1) Increasing atmospheric CO 2 concentration up to 0.05% can enhance CO 2 fixation ... for higher yield (4) Light saturation for CO 2 fixation occurs at 10% of full sunlight

Last Answer : (2) C 3 plants respond to higher temperatures with enhanced photosynthesis while C 4 plants have much lower temperature optimum

Rain drops falling through atmospheric air attain limited terminal velocity, because of (A) Upward thrust due to air (B) Viscous force exerted by air (C) Surface tension effects of water (D) Force of gravity

Description : Rain drops falling through atmospheric air attain limited terminal velocity, because of (A) Upward thrust due to air (B) Viscous force exerted by air (C) Surface tension effects of water (D) Force of gravity

Last Answer : Option B

Increase in atmospheric temperature due to `CO_(2)` is called :

Description : Increase in atmospheric temperature due to `CO_(2)` is called :

Last Answer : Increase in atmospheric temperature due to `CO_(2)` is called : A. Pasteur effect B. Blackman effect C. Emersion effect D. Green-house effect

Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:

Description : Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:

Last Answer : Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as ... effect C. Green house effect D. Solar effect.

Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:

Description : Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:

Last Answer : Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known ... effect C. Radioactive effect D. Green house effect.

The `CO_(2)` content by volume, in the atmospheric air is about

Description : The `CO_(2)` content by volume, in the atmospheric air is about

Last Answer : The `CO_(2)` content by volume, in the atmospheric air is about A. 3.6E-5 B. 0.00036 C. 0.0036 D. 0.036

Level of atmospheric `CO_(2)` has increased in 2000 from

Description : Level of atmospheric `CO_(2)` has increased in 2000 from

Last Answer : Level of atmospheric `CO_(2)` has increased in 2000 from A. 280 ppm to 360 ppm B. 250 ppm to 300 ppm C. 300 ppm to 340 ppm D. 330 ppm to 350 ppm

Given statement is true or false Statement: Actual site of diffusion of `O_(2) and CO_(2)` between blood and atmospheric air is exchange part.

Description : Given statement is true or false Statement: Actual site of diffusion of `O_(2) and CO_(2)` between blood and atmospheric air is exchange part.

Last Answer : Given statement is true or false Statement: Actual site of diffusion of `O_(2) and CO_(2)` between blood and atmospheric air is exchange part.

Given statement is true or false Statement: Actual site of diffusion of `O_(2) and CO_(2)` between blood and atmospheric air is exchange part.

Description : Given statement is true or false Statement: Actual site of diffusion of `O_(2) and CO_(2)` between blood and atmospheric air is exchange part.

Last Answer : Given statement is true or false Statement: Actual site of diffusion of `O_(2) and CO_(2)` between blood and atmospheric air is exchange part.

PGA as the first `CO_(2)` fixation product was discovered in photosynthesis of

Description : PGA as the first `CO_(2)` fixation product was discovered in photosynthesis of

Last Answer : PGA as the first `CO_(2)` fixation product was discovered in photosynthesis of A. Angiosperm B. Alga C. Bryophyte D. Gymnosperm

Assertion: Assimilotary power in photosynthesis is generated in ETS occuring in thylakoid membrane . Reason : They are needed for `CO_(2)` reduction.

Description : Assertion: Assimilotary power in photosynthesis is generated in ETS occuring in thylakoid membrane . Reason : They are needed for `CO_(2)` reduction.

Last Answer : Assertion: Assimilotary power in photosynthesis is generated in ETS occuring in thylakoid membrane . ... If both Assertion and Reason are false.

The primary receptor of `CO_(2)` in photosynthesis is

Description : The primary receptor of `CO_(2)` in photosynthesis is

Last Answer : The primary receptor of `CO_(2)` in photosynthesis is A. Phosphoric acid B. Ribulose phosphate C. Glucose D. Ribulose 1,5-bisphosphate

Source of `CO_(2)` for photosynthesis during day in CAM plant is

Description : Source of `CO_(2)` for photosynthesis during day in CAM plant is

Last Answer : Source of `CO_(2)` for photosynthesis during day in CAM plant is A. 3-PGA B. Malic acid C. Oxaloacetic acid D. Pyruvate

Reducing agent for `CO_(2)` fixation in bacterial photosynthesis is

Description : Reducing agent for `CO_(2)` fixation in bacterial photosynthesis is

Last Answer : Reducing agent for `CO_(2)` fixation in bacterial photosynthesis is A. `NADH_(2)` B. `NADPH_(2)` C. `FMNH_(2)` D. All of these

Which of the following statements regarding IL-1 are correct? a. While IL-1 and TNFa share many biologic effects, IL-1 appears to be more potent b. IL-1 expression is in part autoregulated c. IL-1 inhibits prostaglandin production d. The ability of IL-1 to upregulate endothelial cell-neutrophil adhesion molecules is relatively limited

Description : Which of the following statements regarding IL-1 are correct? a. While IL-1 and TNFa share many biologic effects, IL-1 appears to be more potent b. IL-1 expression is in part ... production d. The ability of IL-1 to upregulate endothelial cell-neutrophil adhesion molecules is relatively limited

Last Answer : Answer: b IL-1 and TNFa share many biologic properties. In addition, each potentiates the effects of the other one when given concurrently. Overall, IL-1 alone probably has weaker effects than ... IL-1 provides a key step in the extravasation of leukocytes to sites of local inflammation and injury

The best understood intracellular messenger is cyclic AMP (cAMP). Which of the following statement(s) concerning this intracellular messenger is/are correct? a. Intracellular cyclic AMP is constantly degraded by a specific enzyme, cAMP phosphodiesterase b. Most of the actions of cAMP are mediated by activation of protein kinase A c. Intracellular levels of cAMP are relatively stable and change solely in response to activation of adenylate cyclase d. cAMP is the only cyclic nucleotide active as an intracellular messenger

Description : The best understood intracellular messenger is cyclic AMP (cAMP). Which of the following statement(s) concerning this intracellular messenger is/are correct? a. Intracellular cyclic AMP is constantly ... of adenylate cyclase d. cAMP is the only cyclic nucleotide active as an intracellular messenger

Last Answer : Answer: a, b The prototypic intracellular messenger is cAMP. To function as a mediator, the concentration of cAMP must change rapidly. In resting cells, cAMP is continuously being degraded by ... produce cGMP. Intracellular calcium ions also serve as second messengers in a large number of cells

The amount of oxygen in the atmosphere remains relatively constant because it is given off by - (1) Oceans (2) Animals (3) Rocks (4) Plants

Description : The amount of oxygen in the atmosphere remains relatively constant because it is given off by - (1) Oceans (2) Animals (3) Rocks (4) Plants

Last Answer : (4) Plants Explanation: Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of ... of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.

The amount of oxygen in the atmosphere remains relatively constant because it is given off by (1) Oceans (2) Animals (3) Rocks (4) Plants

Description : The amount of oxygen in the atmosphere remains relatively constant because it is given off by (1) Oceans (2) Animals (3) Rocks (4) Plants

Last Answer : Plants

Why are the numbers of trophic levels limited?

Description : Why are the numbers of trophic levels limited?

Last Answer : At each trophic level in a food chain, a large portion of theenergy is utilized for the maintenance of organisms which occur atthat trophic level and lost as heat. As a result of this, organismsin each trophic level pass on less and less energy to the nexttrophic levels, than they receive.

Why are the numbers of trophic levels limited?

Description : Why are the numbers of trophic levels limited?

Last Answer : At each trophic level in a food chain, a large portion of theenergy is utilized for the maintenance of organisms which occur atthat trophic level and lost as heat. As a result of this, organismsin each trophic level pass on less and less energy to the nexttrophic levels, than they receive.

Most hormone receptors are localized on the cell membrane and transduce hormone binding into altered levels of intracellular messengers. A limited number of intracellular receptors do exist. Which of the following statement(s) is/are true concerning intracellular receptors? a. The messengers or hormones must by lipophilic b. These intracellular receptors generally regulate protein synthesis c. The intracellular receptors are located entirely in the nucleus of the cell d. A heat-shock protein serves as an inhibitor protein blocking the DNA-binding domain of the steroid receptor

Description : Most hormone receptors are localized on the cell membrane and transduce hormone binding into altered levels of intracellular messengers. A limited number of intracellular receptors do exist. Which of ... protein serves as an inhibitor protein blocking the DNA-binding domain of the steroid receptor

Last Answer : Answer: a, d Although most hormone and other messenger receptors are extracellular, intracellular receptors have been identified. The hormone messengers involved for these receptors are primarily ... DNA-binding domain of the receptor. Activation involves the dissociation of the inhibitor protein

Consider the following statements concerning food chains. A. Removal of 80% tigers from an area resulted in greatly increased growth of vegetation. B. Removal of most of the carnivores resulted in an increased population of deers. C. The length of food chains is generally limited to 3-4 trophic levels due to energy loss. D. The length of food chains may vary from 2 to 8 trophic levels. Which two of the above statements are correct? (a) A, D (b) A, B (c) B, C (d) C, D

Description : Consider the following statements concerning food chains. A. Removal of 80% tigers from an area resulted in greatly increased growth of vegetation. B. Removal of most of the carnivores resulted in an increased population of deers. C. ... are correct? (a) A, D (b) A, B (c) B, C (d) C, D

Last Answer : (c) B, C

Which is a significant contributor to increased levels of atmospheric carbon dioxide?

Description : Which is a significant contributor to increased levels of atmospheric carbon dioxide?

Last Answer : Deforestation

Which is a significant contributor to increased levels of atmospheric carbon dioxide?

Description : Which is a significant contributor to increased levels of atmospheric carbon dioxide?

Last Answer : Deforestation